Finally found 4561 Railway Express for an ok price at the thrift store. It even included 10014 Caboose as a bonus. So far it's looks mostly all there. : r/LEGOtrains
LEGO Set 4561-1-s2 Railway Express Car Carriage (1999 Train > 9V) | Rebrickable - Build with LEGO
LEGO Set 4560-1 Railway Express (1999 Train > 9V) | Rebrickable - Build with LEGO
LEGO 9V Train 4561 Railway Express from 1999 - YouTube
MOC] Virtual - 4561 upgrade to locomotive and Club Car - LEGO Train Tech - Eurobricks Forums
LEGO 4561 Railway Express | Brickset
LEGO train set and extra track - toys & games - by owner - sale - craigslist
LEGO 4561 Pociąg - Ekspres Alpejski | Wejherowo | Kup teraz na Allegro Lokalnie